ref: 353cbde75a19b004ab0c5339684f33ea47ef1244
parent: f0c1d251cbf8bc1213c192fc3afcc0fe566bafb5
author: rodri <rgl@antares-labs.eu>
date: Sat Oct 7 13:17:30 EDT 2023
use a better random source. fix a bug with andys generating oob cell coordinates.